1 /*
2 * Copyright 2016 Jakub Klama <jceel@FreeBSD.org>
3 * All rights reserved
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted providing that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
23 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 *
26 */
27
28 /*
29 * Minimal libsbuf reimplementation for Mac OS X.
30 */
31
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <string.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37 #include "sbuf.h"
38
39 #define SBUF_INITIAL_SIZE 128
40
41 struct sbuf *
sbuf_new_auto()42 sbuf_new_auto()
43 {
44 struct sbuf *s;
45
46 s = malloc(sizeof(struct sbuf));
47 s->s_buf = calloc(1, SBUF_INITIAL_SIZE + 1);
48 s->s_capacity = s->s_buf != NULL ? SBUF_INITIAL_SIZE : 0;
49 s->s_size = 0;
50
51 return (s);
52 }
53
54 int
sbuf_cat(struct sbuf * s,const char * str)55 sbuf_cat(struct sbuf *s, const char *str)
56 {
57 int req = (int)strlen(str);
58
59 if (s->s_size + req >= s->s_capacity) {
60 s->s_capacity = s->s_size + req + 1;
61 s->s_buf = realloc(s->s_buf, (size_t)s->s_capacity);
62 }
63 if (s->s_buf == NULL)
64 return (-1);
65
66 strcpy(s->s_buf + s->s_size, str);
67 s->s_size += req;
68
69 return (0);
70 }
71
72 int
sbuf_printf(struct sbuf * s,const char * fmt,...)73 sbuf_printf(struct sbuf *s, const char *fmt, ...)
74 {
75 int ret;
76 va_list ap;
77
78 va_start(ap, fmt);
79 ret = sbuf_vprintf(s, fmt, ap);
80 va_end(ap);
81
82 return (ret);
83 }
84
85 int
sbuf_vprintf(struct sbuf * s,const char * fmt,va_list args)86 sbuf_vprintf(struct sbuf *s, const char *fmt, va_list args)
87 {
88 va_list copy;
89 int req;
90
91 va_copy(copy, args);
92 req = vsnprintf(NULL, 0, fmt, copy);
93 va_end(copy);
94
95 if (s->s_size + req >= s->s_capacity) {
96 s->s_capacity = s->s_size + req + 1;
97 s->s_buf = realloc(s->s_buf, (size_t)s->s_capacity);
98 }
99 if (s->s_buf == NULL)
100 return (-1);
101
102 req = vsnprintf(s->s_buf + s->s_size, req + 1, fmt, args);
103 s->s_size += req;
104
105 return (0);
106 }
107
108 char *
sbuf_data(struct sbuf * s)109 sbuf_data(struct sbuf *s)
110 {
111 return (s->s_buf);
112 }
113
114 int
sbuf_finish(struct sbuf * s)115 sbuf_finish(struct sbuf *s)
116 {
117 if (s->s_buf != NULL)
118 s->s_buf[s->s_size] = '\0';
119 return (0);
120 }
121
122 void
sbuf_delete(struct sbuf * s)123 sbuf_delete(struct sbuf *s)
124 {
125 free(s->s_buf);
126 free(s);
127 }
128